Re: I would kill for flexible sander!!Argh...
In my experience, the ONLY way to get a really fair surface on a large sailboat hull is to use a LONG longboard of some kind - one that requires three people to handle it, or some sort of powered version like I mentioned earlier.
I've seen air files like in post #2 used and they don't work well - the bearing surface is too small. The most effective one man tool I've seen is a large variable speed disc sander/polisher with a soft foam pad but even they don't do well when the panels get large.
I, myself, personally intend to continue being outspoken and opinionated, intolerant of all fanatics, fools and ignoramuses, deeply suspicious of all those who have "found the answer" and on my bad days, downright rude.